In an unforeseen turn of event, a former British prince has been detained, eliciting a reaction from the U.S. President who expressed his sadness over the incident. The details of the reason behind the arrest are yet unspecified, but the situation has caused significant international tension. Given the high profile nature of the individuals involved, this incident is of worldwide interest and implications.

In Japan, the varying reactions by the public reflect the country's vested interest in international affairs. The news of British royalty being arrested resonate in a country where the monarchy is still respected, and any legal proceedings involving such high-profile figures often invite scrutiny from the public and the media.

In comparison, in the U.S. or EU, such issues would equally receive significant public and media attention. However, the reactions could be more varied owing to differences in attitudes towards monarchy and political figures. While some might view such a case with serious concern, others may see it as a reminder that everyone should be held accountable.